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A124378
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Primitive elements of A064362.
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2
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5, 8, 12, 13, 17, 21, 28, 33, 37, 53, 57, 61, 69, 73, 77, 87, 89, 92, 93, 97, 109, 113, 133, 137, 141, 149, 157, 164, 172, 173, 177, 188, 193, 197, 203, 213, 217, 233, 237, 253, 257, 268, 269, 277, 287, 293, 301, 303, 309, 313, 317, 329, 332, 337, 353, 373, 381
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OFFSET
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1,1
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COMMENTS
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Numbers n such that no Lucas number is a multiple of n, which are not divisible by any smaller number with that property.
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LINKS
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MATHEMATICA
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test[n_] := Module[{a, b, t}, {a, b} = {2, 1}; While[t = b; b = Mod[a + b, n]; a = t; ! (b == 0 || {a, b} == {2, 1})]; b == 0]; t = {}; n = 0; While[Length[t] < 1000, n++; If[! MemberQ[Mod[n, t], 0] && ! test[n], AppendTo[t, n]]]; t (* T. D. Noe, Mar 20 2013 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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